Hi, I'm having the same issue but seems more stubborn! My DW is 6 years old.

The panel lights flash in a strange way (the same way every time I turn power on, though) and the drain pump runs continually even when the door is open, as long as the power button is "on".

I removed the side panel and confirmed:
- no water in the flood pan
- floats are clean and moving normally
- manually pushed the pump switch on and off and still pump is running.

Bosch Model # SHX46A05UC / 38

please help! this is my 3rd appliance breakdown this week!

-Chris